1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.io.Serializable;
26  
27  import java.util.Collection;
28  import java.util.HashSet;
29  import java.util.Map;
30  import java.util.Set;
31  
32  /**
33   * <a href="MultiValueMap.java.html"><b><i>View Source</i></b></a>
34   *
35   * @author Alexander Chow
36   */
37  public abstract class MultiValueMap
38      <K extends Serializable, V extends Serializable> implements Map<K, V> {
39  
40      public Set<Map.Entry<K, V>> entrySet() {
41          throw new UnsupportedOperationException();
42      }
43  
44      public V get(Object key) {
45          throw new UnsupportedOperationException();
46      }
47  
48      public abstract Set<V> getAll(Object key);
49  
50      public abstract Set<V> putAll(K key, Collection<? extends V> values);
51  
52      public void putAll(Map<? extends K, ? extends V> map) {
53          MultiValueMap<? extends K, ? extends V> multiValueMap = null;
54  
55          if (map instanceof MultiValueMap) {
56              multiValueMap = (MultiValueMap<? extends K, ? extends V>)map;
57          }
58  
59          for (K key : map.keySet()) {
60              if (multiValueMap != null) {
61                  putAll(key, multiValueMap.getAll(key));
62              }
63              else {
64                  put(key, map.get(key));
65              }
66          }
67      }
68  
69      public int size() {
70          int size = 0;
71  
72          for (K key : keySet()) {
73              size += size(key);
74          }
75  
76          return size;
77      }
78  
79      public int size(Object key) {
80          int size = 0;
81  
82          Collection<V> values = getAll(key);
83  
84          if (values != null) {
85              size = values.size();
86          }
87  
88          return size;
89      }
90  
91      public Collection<V> values() {
92          Set<V> values = new HashSet<V>();
93  
94          Set<K> keys = keySet();
95  
96          for (K key : keys) {
97              values.addAll(getAll(key));
98          }
99  
100         return values;
101     }
102 
103 }